English
新闻公告
More
化学进展 DOI: 10.7536/PC230707   

• •

硫酸根自由基:强化污泥脱水新利器

赖月1, 王超1, 张洁1, 周顺桂1, 刘昌庚2,*, 叶捷1,*   

  1. 1.福建农林大学资源与环境学院,福建省土壤环境健康与调控重点实验室 福州 350002;
    2.四川师范大学化学与材料科学学院 成都 610066
  • 收稿日期:2023-07-14 修回日期:2024-01-28
  • 基金资助:
    福建省生态产业绿色技术重点实验室开放基金(WYKF-EIGT2021-3)资助

Sulfate Radicals: A New Tool for Enhancing Sludge Dewatering

Yue Lai1, Chao Wang1, Jie Zhang1, Shungui Zhou1, Changgeng Liu2,*, Jie Ye1,*   

  1. 1. College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China;
    2. College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610066, China
  • Received:2023-07-14 Revised:2024-01-28
  • Contact: *e-mail: changwyx@163.com;jieye@fafu.edu.cn
  • Supported by:
    Open Fund of Key Laboratory of Green Technology in Ecological Industry of Fujian Province (WYKF-EIGT2021-3).
污泥是污水处理过程中不可避免的副产物。由于其含水率高、体积大且含有大量有毒有害物质,因此需要进行减量化和无害化处理。然而,污泥拥有带负电官能团电离形成的胞外聚合物(EPS),能够维持稳定的水合胶体结构阻止水的释放,是造成污泥脱水困难的关键因素。近十年,基于硫酸根自由基的高级氧化技术(SR-AOPs)因其对EPS破解效率高、反应迅速且环境友好等优点受到大量关注,硫酸根自由基也因此成为强化污泥脱水的新利器。本文详细梳理了硫酸根自由基的发展时间线和活化机制,系统评价了国内外SR-AOPs改善污泥脱水性能、去除污泥中微量污染物和重金属的研究现状。基于现阶段SR-AOPs在污泥调理方面存在的科学问题,从机理研究、成本效益、试验规模等角度展望了未来的发展研究方向,以期为我国污水处理厂的污泥调理提供坚实理论参考。
Sludge is an inevitable by-product of the wastewater treatment process. Due to its high water content, large volume, and a large amount of toxic and hazardous substances, therefore it needs to be minimization and harmless treatment. However, sludge possesses extracellular polymeric substances (EPS) formed by ionization of negatively charged functional groups, which maintain a stable hydrated colloidal structure and prevent the release of water. This is a key factor in the difficulty of sludge dewatering. In the last decade, sulfate radical-based advanced oxidation processes (SR-AOPs) have received considerable attention due to their high efficiency for EPS disintegration, rapid reaction time and environmental friendliness, and thus sulfate radicals have become a new powerful tool for enhancing sludge dewaterability. In this paper, the development timeline and activation mechanisms of sulfate radicals were reviewed in detail, and the research advances of SR-AOPs for improving sludge dewaterability and removing micropollutants and heavy metals from sludge were systematically evaluated. Based on the current scientific problems of SR-AOPs in sludge conditioning, the future research directions of SR-AOPs were proposed from the perspectives of mechanism research, cost-effectiveness, and experimental scale, in order to provide a solid theoretical reference for sludge conditioning in wastewater treatment plants in China.

中图分类号: 

()
[1] 李怡宁, 隋铭皓. 基于过氧乙酸的高级氧化技术及在水处理消毒中的应用[J]. 化学进展, 2023, 35(8): 1258-1265.
[2] 吴飞, 任伟, 程成, 王艳, 林恒, 张晖. 基于生物炭的高级氧化技术降解水中有机污染物[J]. 化学进展, 2022, 34(4): 992-1010.
[3] 韩文亮, 董林洋. 基于硫酸根自由基的先进氧化活化方法及其在有机污染物降解上的应用[J]. 化学进展, 2021, 33(8): 1426-1439.
[4] 杨世迎, 薛艺超, 王满倩. 络合态重金属废水处理:基于高级氧化技术的解络合机制[J]. 化学进展, 2019, 31(8): 1187-1198.
[5] 刘莹, 何宏平, 吴德礼, 张亚雷. 非均相催化臭氧氧化反应机制[J]. 化学进展, 2016, 28(7): 1112-1120.
[6] 林恒, 张晖. 电-Fenton及类电-Fenton技术处理水中有机污染物[J]. 化学进展, 2015, 27(8): 1123-1132.
[7] 龙安华, 雷洋, 张晖. 活化过硫酸盐原位化学氧化修复有机污染土壤和地下水[J]. 化学进展, 2014, 26(05): 898-908.
[8] 王彦斌, 赵红颖, 赵国华, 王宇晶, 杨修春. 基于铁化合物的异相Fenton催化氧化技术[J]. 化学进展, 2013, 25(08): 1246-1259.
[9] 韩强, 杨世迎, 杨鑫, 邵雪停, 牛瑞, 王雷雷. 钴催化过一硫酸氢盐降解水中有机污染物:机理及应用研究[J]. 化学进展, 2012, 24(01): 144-156.
[10] 杨世迎,陈友媛,胥慧真,王萍,刘玉红,张卫,王茂东. 过硫酸盐活化高级氧化新技术*[J]. 化学进展, 2008, 20(09): 1433-1438.